Static and Dynamic Mechanical Properties of Graphene Oxide-Incorporated Woven Carbon Fiber/Epoxy Composite

Adak, Nitai Chandra,Chhetri, Suman,Kim, Nam Hoon,Murmu, Naresh Chandra,Samanta, Pranab,Kuila, Tapas Springer-Verlag 2018 Journal of materials engineering and performance Vol.27 No.3

<P>This study investigates the synergistic effects of graphene oxide (GO) on the woven carbon fiber (CF)-reinforced epoxy composites. The GO nanofiller was incorporated into the epoxy resin with variations in the content, and the CF/epoxy composites were manufactured using a vacuum-assisted resin transfer molding process and then cured at 70 and 120 A degrees C. An analysis of the mechanical properties of the GO (0.2 wt.%)/CF/epoxy composites showed an improvement in the tensile strength, Young's modulus, toughness, flexural strength and flexural modulus by similar to 34, 20, 83, 55 and 31%, respectively, when compared to the CF/epoxy composite. The dynamic mechanical analysis of the composites exhibited an enhancement of similar to 56, 114 and 22% in the storage modulus, loss modulus and damping capacity (tan delta), respectively, at its glass transition temperature. The fiber-matrix interaction was studied using a Cole-Cole plot analysis.</P>

Effects of hydrazine reduced graphene oxide on the inter-laminar fracture toughness of woven carbon fiber/epoxy composite

Adak, Nitai Chandra,Chhetri, Suman,Kuila, Tapas,Murmu, Naresh Chandra,Samanta, Pranab,Lee, Joong Hee Elsevier 2018 Composites. Part B, Engineering Vol.149 No.-

<P><B>Abstract</B></P> <P>In this work, the hybridization effects of hydrazine reduced graphene oxide (rGO) on the inter-laminar shear strength (ILSS), impact strength, and in-plane fracture toughness of symmetric type carbon fiber/epoxy composite (CF/epoxy) laminates were investigated. The composite laminates were fabricated through the vacuum-assisted resin transfer molding (VARTM) process. At 0.2 wt% of rGO loading, the CF/epoxy composites showed the best load carrying capacity among the developed laminates. ILSS, impact strength, and critical stress intensity factor (<I>K</I> <SUB> <I>IC</I> </SUB>) were enhanced by ∼ (84, 100, and 33) %, respectively, in the case of rGO (0.2 wt%) filled CF/epoxy composite specimens, as compared to CF/epoxy composite. The consumed fracture energy of rGO (0.2 wt%)/CF/epoxy increased, as compared to the rGO (0.4 wt%)/CF/epoxy composite. The fracture surfaces obtained from field emission scanning electron microscopy of the developed composites showed compatible dispersion of rGO in the epoxy matrix, and branched fracture of the specimens. This study suggests that the rGO nanofiller might be used as a matrix modifier to resist matrix fracture, as well as fiber fracture.</P>

Covalent surface modification of chemically derived graphene and its application as supercapacitor electrode material

Jana, Milan,Khanra, Partha,Murmu, Naresh Chandra,Samanta, Pranab,Lee, Joong Hee,Kuila, Tapas The Royal Society of Chemistry 2014 Physical chemistry chemical physics Vol.16 No.16

<P>A simple and effective method using 6-amino-4-hydroxy-2-naphthalenesulfonic acid (ANS) for the synthesis of water dispersible graphene has been described. Ultraviolet-visible (UV-vis) spectroscopy reveals that ANS-modified reduced graphene oxide (ANS-rGO) obeys Beers law at moderate concentrations. Fourier transform infrared and X-ray photoelectron spectroscopies provide quantitative information regarding the removal of oxygen functional groups from graphene oxide (GO) and the appearance of new functionalities in ANS-rGO. The electrochemical performances of ANS-rGO have been determined by cyclic voltammetry, charge–discharge and electrochemical impedance spectroscopy analysis. Charge–discharge experiments show that ANS-rGO is an outstanding supercapacitor electrode material due to its high specific capacitance (375 F g<SUP>−1</SUP> at a current density of 1.3 A g<SUP>−1</SUP>) and very good electrochemical cyclic stability (∼97.5% retention in specific capacitance after 1000 charge–discharge cycles). ANS-rGO exhibits promising characteristics with a very high power density (1328 W kg<SUP>−1</SUP>) and energy density (213 W h kg<SUP>−1</SUP>).</P> <P>Graphic Abstract</P><P>A simple and effective method using 6-amino-4-hydroxy-2-napthalenesulfonic acid (ANS) for the synthesis of water dispersible graphene is described. The as-produced graphene is a promising supercapacitor electrode material. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cp54510e'> </P>

Development of Cobalt Sulfide-graphene Composite for Supercapacitor Applications

( Milan Jana ),( Pranab Samanta ),( Naresh Chandra Murmu ),( Nam Hoon Kim ),( Tapas Kuila ),( Joong Hee Lee ) 한국복합재료학회 2016 Composites research Vol.29 No.4

Co₉S₈/reduced graphene (CSRG) has been prepared by a facile two step hydrothermal method and used as a supercapacitor electrode material. It is anticipated that the Co₉S₈ and reduced graphene oxide (RGO) would serve as a spacer material to each other to stop the agglomeration and simultaneous contribution of electrical double layer capacitance (RGO) and pseudocapacitance (Co₉S₈) would provide high electrochemical properties. The chemical analysis has been done by Fourier transform infrared spectroscopy and the morphology is characterised by field emission scanning electron microscopy. CSRG shows a high electrical conductivity of 98 S m^-1. The symmetric supercapacitor shows a specific capacitance of ~728 F g^-1 with a current density of 2 A g^-1. CSRG also showed an energy density of 25.2 Wh kg^-1 with a power density of 1000 W kg^-1.

Facile Electrodeposition Technique for the Fabrication of MoP Cathode for Supercapacitor Application

( Prakas Samanta ),( Souvik Ghosh ),( Naresh Chandra Murmu ),( Joong Hee Lee ),( Tapas Kuila ) 한국복합재료학회 2021 Composites research Vol.34 No.6

The continued environmental pollution caused by fossil fuel consumption has prompted researchers around the world to develop environmentally friendly energy technologies. Electrochemical energy storage is the significant area of research in this development process, and the research significance of supercapacitors in this field is increasing. Herein, a simple electrodeposition synthetic route was explored to develop the MoP layered cathode material. The layered structure provided a highly ion-accessible surface for smooth and faster ion adsorption/ desorption. After Fe was doped into MoP, the morphology of MoP changes and the electrochemical performance was significantly improved. Specific capacitance value of the binder-free FeMoP electrode was found to be 269 F g^-1 at 2 A g^-1 current density in 6 M aqueous KOH electrolyte. After adding Fe to MoP, an additional redox contribution was observed in the redox conversion from Fe³⁺ to Fe²⁺ redox pair, and the charge transfer kinetics of MoP was effectively improved. This research can provide guidance for the development of supercapacitor electrode materials through simple electrodeposition technology.

Synthesis of Activated Carbon from a Bio Waste (Flower of Shorea Robusta) Using Different Activating Agents and Its Application as Supercapacitor Electrode

Souvik Ghosh,Prakas Samanta,Naresh Chandra Murmu,김남훈,Tapas Kuila 한국복합재료학회 2022 Composites research Vol.35 No.1

The activated carbon is a very good choice for using as supercapacitor electrode materials. Herein, the flower of Shorea robusta a bio-waste material was successfully used to synthesize the activated carbons for application as electrode materials of supercapacitor. The activated carbon was synthesized through chemical activation process followed by thermal treatment at 700oC in presence of N2 atmosphere using KOH, ZnCl2 and H3PO4 as the activating agents. The physicochemical analyses demonstrate that the obtained activated carbons are graphitic in nature and the degree of disorder of the graphitic carbons is changed with changing the activating agents. The activated carbon obtained from Shorea robusta flower (ACSF-K) electrode shows the specific capacitance of ~610 F g-1 at 2 A g-1 current density, which is higher than ACSF-Z (560 F g-1) and ACSF-H (470 F g-1) electrode material under the identical current density. The synthesized graphitic carbons also demonstrate good rate capability and high electrochemical stability as supercapacitor electrode.

Investigation of the mechanical and thermal properties of <small>L</small>-glutathione modified graphene/epoxy composites

Chhetri, Suman,Adak, Nitai Chandra,Samanta, Pranab,Murmu, Naresh Chandra,Hui, David,Kuila, Tapas,Lee, Joong Hee Elsevier 2018 Composites Part B, Engineering Vol.143 No.-

<P><B>Abstract</B></P> <P>Nacre-like graphene nanosheets (GNS) obtained from the <SMALL>L</SMALL>-glutathione mediated reduction of graphene oxide (GO) were used to develop epoxy composites. Field emission scanning electron microscopy (FE-SEM) revealed the layer-by-layer nacre-like structure of GNS. Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), Raman spectroscopy, and thermogravimetric analysis (TGA) measurements confirmed the successful reduction of GO. The oxidized product of <SMALL>L</SMALL>-glutathione is expected to perform as capping agent to stabilize the GNS, and also stitches the graphene sheets through hydrogen bonding. Transmission electron microscopy was used to confirm the dispersion of GNS in the epoxy matrix. The GNS/epoxy composites showed significant improvement of ∼91% in fracture toughness (K<SUB>IC</SUB>), 46% in flexural strength, and 71% in flexural modulus at 0.25 wt% GNS loadings. The probable toughening mechanism was elucidated from fracture FE-SEM images. The improved compatibility and strong interfacial interaction were reflected in the enhanced storage modulus value. The thermal stability of the composites as investigated by TGA showed appreciable improvement in the degradation temperature.</P>

Enhanced Mechanical Properties of Functionalized Graphene Oxide/linear Low Density Polyethylene Composites Prepared by Melt Mixing

( Suman Chhetri ),( Pranab Samanta ),( Naresh Chandra Murmu ),( Tapas Kuila ),( Joong Hee Lee ) 한국복합재료학회 2016 Composites research Vol.29 No.4

Graphene oxide (GO) was concurrently reduced and functionalized using long alkyl chain dodecyl amine (DA). The DA functionalized GO (DA-G) was assumed to disperse homogenously in linear low density polyethylene (LLDPE). Subsequently, DA-G was used to fabricate DA-G/LLDPE composites by melt mixing technique. Fourier transform infrared spectra analysis was performed to ascertain the simultaneous reduction and functionlization of GO. Field emission scanning electron microscopy analysis was performed to ensure the homogenous distribution and dispersion of DA-G in LLDPE matrix. The enhanced storage modulus value of the composites validates the homogenous dispersion of DA-G and its good interfacial interaction with LLDPE matrix. An increased in tensile strength value by ~ 64% also confirms the generation of good interface between the two constituents, through which efficient load transfer is possible. However, no significant improvement in glass transition temperature was observed. This simple technique of fabricating LLDPE composites following industrially viable melt mixing procedure could be realizable to developed mechanically strong graphene based LLDPE composites for future applications.

Self Charging Sulfanilic Acid Azocromotrop/Reduced Graphene Oxide Decorated Nickel Oxide/Iron Oxide Solar Supercapacitor for Energy Storage Application

( Sanjit Saha ),( Milan Jana ),( Pranab Samanta ),( Naresh Chandra Murmu ),( Joong Hee Lee ),( Tapas Kuila ) 한국복합재료학회 2016 Composites research Vol.29 No.4

A self-charging supercapacitor is constructed through simple integration of the energy storage and photo exited materials at the photo electrode. The large band gap of NiO//Fe₃O₄ heterostructure generates photo electron at the photo electrode and store the charges through redox mechanism at the counter electrode. Sulfanilic acid azocromotrop/reduced graphene oxide layer at the photo electrode trapped the photo generated hole and store the charge by forming double layer. The solar supercapacitor device is charged within 400 s up to 0.5 V and exhibited a high specific capacitance of ~908 F/g against 1.5 A/g load. The solar illuminated supercapacitor shows a high energy and power density of 33.4 Wh/kg and 385 W/kg along with a very low relaxation time of ~15 ms ensuring the utility of the self charging device in the various field of energy storage and optoelectronic application.

A successive ionic layer adsorption and reaction (SILAR) method to fabricate a layer-by-layer (LbL) MnO₂-reduced graphene oxide assembly for supercapacitor application

Jana, Milan,Saha, Sanjit,Samanta, Pranab,Murmu, Naresh Chandra,Kim, Nam Hoon,Kuila, Tapas,Lee, Joong Hee Elsevier 2017 Journal of Power Sources Vol.340 No.-

<P><B>Abstract</B></P> <P>A facile, cost effective and additive-free successive ionic layer adsorption and reaction (SILAR) technique is demonstrated to develop layer-by-layer (LbL) assembly of reduced graphene oxide (RGO) and MnO<SUB>2</SUB> (MnO<SUB>2</SUB>-RGO<SUB>SILAR</SUB>) on a stainless steel current collector, for designing light-weight and small size supercapacitor electrode. The transmission electron microscopy and field emission scanning electron microscopy images shows uniform distribution of RGO and MnO<SUB>2</SUB> in the MnO<SUB>2</SUB>-RGO<SUB>SILAR</SUB>. The LbL (MnO<SUB>2</SUB>-RGO<SUB>SILAR</SUB>) demonstrates improved physical and electrochemical properties over the hydrothermally prepared MnO<SUB>2</SUB>-RGO (MnO<SUB>2</SUB>-RGO<SUB>Hydro</SUB>). The electrochemical environment of MnO<SUB>2</SUB>-RGO<SUB>SILAR</SUB> is explained by constant phase element in the high frequency region, and a Warburg element in the low frequency region in the Z-View fitted Nyquist plot. The equivalent circuit of the MnO<SUB>2</SUB>-RGO<SUB>Hydro</SUB>, displays the co-existence of EDL and constant phase element, indicating inhomogeneous distribution of MnO<SUB>2</SUB> and RGO by the hydrothermal technique. An asymmetric supercapacitor device is designed with MnO<SUB>2</SUB>-RGO<SUB>SILAR</SUB> as positive electrode, and thermally reduced GO (TRGO) as negative electrode. The designed cell exhibits high energy density of ∼88 Wh kg<SUP>−1</SUP>, elevated power density of ∼23,200 W kg<SUP>−1</SUP>, and ∼79% retention in capacitance after 10,000 charge-discharge cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Layer-by-layer assembly (LbL) of MnO<SUB>2</SUB> and reduced graphene oxide (RGO) is prepared. </LI> <LI> The LbL acts as single material with hybrid electrochemical properties. </LI> <LI> Uniform distribution of MnO<SUB>2</SUB> over RGO exhibits high specific capacitance. </LI> <LI> No organic binder is used to design the supercapacitor electrodes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>The LbL RGO-MnO<SUB>2</SUB> acts as single hybrid electro-active material and the hydrothermally prepared RGO-MnO<SUB>2</SUB> provides mixed properties of two materials.</P> <P>[DISPLAY OMISSION]</P>